CNC Machine Operator practice interview
CNC machine set-up, drawing interpretation, dimensional inspection, tool monitoring and safe operation. Practise the 5 questions interviewers ask for this role with follow-ups. Paid plans add scored feedback on every answer.
Free with an Intaviu account: 320 credits a month, at 10 credits a minute of practice. Private: interview creators never see them.
- Junior
- 15 minutes
- 5 questions
- Scored feedback on paid plans
About the role
This interview covers safe CNC operation and the judgement needed to produce parts within tolerance. The panel wants evidence that you can check a set-up, read a drawing, measure accurately and react early to tool wear or an abnormal cut.
How to prepare
- Revise work offsets, tool offsets and the checks needed before a first-piece run.
- Practise reading dimensions, tolerances, surface finish symbols and drawing notes.
- Review when to use callipers, micrometers, bore gauges and other measuring instruments.
- Prepare an example of detecting tool wear or a dimensional trend before producing more scrap.
- Think through how you would identify and contain parts after a set-up error.
Common mistakes
- Starting a cycle without confirming the workpiece, tooling and offsets.
- Naming a measuring instrument without relating its accuracy to the tolerance.
- Adjusting an offset repeatedly without investigating tool wear or set-up movement.
What to expect
A real first-round interview
5 questions the way interviewers ask for this role, with follow-ups when an answer needs more.
Spoken, like the real thing
Speak your answers in your browser or the free desktop app, with live captions. You can ask the interviewer to repeat anything.
Scored on 4 areas
The things this interview weighs most. With a paid plan, your report shows how you did on each one.
A private report
On Plus, Pro and Premium: every answer scored, your strongest lines quoted and what to say differently next time. Interview creators never see it.
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